Multiple Ejaculation Resuspension and Centrifugation (MERC) test

MERC lets us detect sperm in semen samples even when numbers are low.

Our scientists introduced the MERC technique so that, when our patients have a low sperm count or reportedly no sperm, we can try to find sperm in multiple semen samples to use in fertility treatment and avoid the need for surgery. 

Could MERC be right for me?

If you’ve been told you’re producing little or no sperm in your ejaculate, we could recommend MERC as a way of collecting sperm for treatment. If it’s not successful you might then go ahead with surgical sperm retrieval.

Once you’ve given us the samples we’ll process them, finding any sperm that could be used in fertility treatment.

What does MERC involve?

For the MERC test we’ll need you to provide us with several semen samples in one day – usually around three samples with two hours left between each.

Once you’ve given us the samples we’ll process them, finding any sperm that could be used in fertility treatment. If we identify sperm in your samples we might then freeze them to use in future treatments.

To find out more about our male fertility tests, or to book a consultation or a fertility assessment, contact us or speak to your local clinic.